and president obama and mitt romney stayed out of sight as they prepped for their first debate, wednesday night. kwame holman previews some of what we have for you on our web site, including more advice for people facing social security quandaries. >> hman:n toy's installment of "ask larry," retirement expert laurence kotlikoff takes your questions on social security, including how marriage might change disability benefits for mental illness. we take a spin in a "driverless" car in california, where new legislation allows automatically piloted vehicles access to the open road. and poet sharon olds reads some of her work on art beat. all that and more is on our web site, newshour.pbs.org. judy? >> woodruff: and that's the newshour for tonight. on tuesday, we rept on the race in north carolina, which president obama turned blue four years ago, with the help of an historic african-american turnout. i'm judy woodruff. >> brown: and i'm jeffrey brown. we'll see you online, and again here tomorrow evening. thank you, and good night. major funding for the pbs newshour has been provided by: and t